import React, { useState, useEffect, PropsWithChildren } from "react";
import { connect } from "react-redux";
import { Card, Button } from "antd";
import NavHeader from "@/components/NavHeader";
import { getLesson } from "@/api/home";
import { RouteComponentProps, StaticContext } from "react-router";
import actions from "@/store/actions/cart";
import { CombinedState } from "@/store/reducers";
import Lesson, { LessonResult } from "@/typings/lesson";
import "./index.less";
import { Lessons } from "@/store/reducers/home";
const { Meta } = Card;
interface Params {
    id: string;
}
type RouteProps = RouteComponentProps<Params, StaticContext, Lesson>;
type StateProps = ReturnType<typeof mapStateToProps>;
type DispatchProps = typeof actions;
type Props = PropsWithChildren<RouteProps & StateProps & DispatchProps>

function Detail(props: Props) {
    let [lesson, setLesson] = useState<Lesson>({} as Lesson);
    useEffect(() => {
        (async () => {
            let lesson: Lesson = props.location.state;
            if (!lesson) {
                let id = props.match.params.id;
                let result: LessonResult = await getLesson<LessonResult>(id);
                if (result.success) lesson = result.data;
            }
            setLesson(lesson);
        })()
    }, []);
    const addCartItem = (lesson: Lesson) => {
        //https://developer.mozilla.org/zh-CN/docs/Web/API/Element/getBoundingClientRect
        let video: HTMLVideoElement = document.querySelector(
            "#lesson-video"
        );
        let cart: HTMLSpanElement = document.querySelector(
            ".anticon.anticon-shopping-cart"
        );
        let clonedVideo: HTMLVideoElement = video.cloneNode(true) as HTMLVideoElement;
        let videoWidth = video.offsetWidth;
        let videoHeight = video.offsetHeight;
        let cartWidth = cart.offsetWidth;
        let cartHeight = cart.offsetHeight;
        let videoLeft = video.getBoundingClientRect().left;
        let videoTop = video.getBoundingClientRect().top;
        let cartRight = cart.getBoundingClientRect().right;
        let cartBottom = cart.getBoundingClientRect().bottom;
        clonedVideo.style.cssText = `
            z-index:1000;
            opacity:0.8;
            position:fixed;
            width:${videoWidth}px;
            height:${videoHeight}px;
            top:${videoTop}px;
            left:${videoLeft}px;
            transition: all 2s ease-in-out;
            `;
        document.body.appendChild(clonedVideo);
        setTimeout(() => {
            clonedVideo.style.left = cartRight - cartWidth / 2 + "px";
            clonedVideo.style.top = cartBottom - cartHeight / 2 + "px";
            clonedVideo.style.width = `0px`;
            clonedVideo.style.height = `0px`;
            clonedVideo.style.opacity = "50";
        }, 0);
        props.addCartItem(lesson);
    }
    return (
        <>
            <NavHeader history={props.history}>课程详情</NavHeader>
            <Card hoverable style={{ width: "100%" }} cover={<img id="lesson-video" src={lesson.poster} />} >
                <Meta title={lesson.title} description={
                    <>
                        <p>价格：￥{lesson.price}元</p>
                        <p>
                            <Button className="add-cart" onClick={() => addCartItem(lesson)}>加入购物车</Button>
                        </p>
                    </>
                } />
            </Card>
        </>
    );
}

/**
 * https://cubic-bezier.com/#0,0,1,1
 * linear:cubic-bezier(0,0,1,1)             匀速运动
 * ease:cubic-bezier(0.25,0.1,0.25,1)       先慢后快再慢
 * ease-in:cubic-bezier(0.42,0,1,1)         先慢后快
 * ease-out:cubic-bezier(0,0,0.58,1)        先快后慢
 * ease-in-out:cubic-bezier(0.42,0,0.58,1)  先慢后快再慢
 */

let mapStateToProps = (state: CombinedState): CombinedState => state;
export default connect(mapStateToProps, actions)(Detail);
